CN112921422A - Hot box for drawing yarns - Google Patents
Hot box for drawing yarns Download PDFInfo
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- CN112921422A CN112921422A CN202110076209.6A CN202110076209A CN112921422A CN 112921422 A CN112921422 A CN 112921422A CN 202110076209 A CN202110076209 A CN 202110076209A CN 112921422 A CN112921422 A CN 112921422A
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- heating
- box body
- chamber
- box
- auxiliary gas
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/12—Stretch-spinning methods
- D01D5/14—Stretch-spinning methods with flowing liquid or gaseous stretching media, e.g. solution-blowing
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
- D01D10/02—Heat treatment
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
The invention discloses a hot box for drawing yarns, which comprises a box body, wherein a processing chamber for drawing yarns and a heating chamber for heating auxiliary gas are arranged in the box body; a main heating unit is arranged in the processing chamber; the heating chamber is internally provided with an auxiliary heating unit, the air inlet end of the heating chamber is arranged outside the box body, and the air outlet end of the heating chamber is communicated with the processing chamber. The temperature of the nitrogen entering the heating cavity is relatively low, and after the nitrogen is preheated by the auxiliary heating unit in the heating cavity and reaches the degree of being balanced with the temperature in the processing cavity, the preheated nitrogen is conveyed to the processing cavity through the air outlet end of the heating cavity, so that the temperature stability in the processing cavity is not damaged, an inert environment can be provided for the processing cavity, the conveying links of the preheated nitrogen can be reduced, and the purposes of energy conservation and emission reduction are achieved.
Description
Technical Field
The invention belongs to the field of chemical fiber mechanical equipment, and particularly relates to a hot box for drawn yarns.
Background
In the textile field, the fiber can obtain a high-orientation and high-crystallization fiber structure only by a drafting process in the preparation process, so that the fiber has good structure and mechanical property. In the preparation process, the aramid fiber can have excellent mechanical property only by drawing treatment at the temperature of 200-400 ℃.
At such high temperature, if air or oxygen is contained, the aramid fiber is easily degraded or aged, and the quality of the fiber is affected. Therefore, when aramid fiber tows are heated and drawn at high temperature, an inert environment needs to be maintained, so that the oxidation resistance of the fibers is facilitated.
The scheme adopted in the prior art at present is to introduce nitrogen into a drawing hot box to keep the drawing hot box in an inert environment. However, the drawing of the filament bundle requires a stable thermal environment, and whether the hot box for drawing the filament can provide a uniform and stable thermal environment is a very important and key index for evaluating the equipment. If nitrogen gas having a relatively low temperature is supplied into the hot box for drawn yarns, the temperature in the hot box for drawn yarns fluctuates, and the uniform and stable thermal environment is destroyed.
In the prior art, in order to avoid damaging the stability of a thermal environment by nitrogen with lower temperature, a scheme is further improved in that nitrogen with higher temperature is introduced into a hot box for drawing yarns.
However, the problem of increased gas consumption and heat consumption caused by directly introducing nitrogen with higher temperature into the hot box for drawing yarns cannot meet the requirements of energy conservation and emission reduction.
The present invention has been made in view of this situation.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a hot box for drawn yarns, wherein a heating chamber is arranged in the hot box for drawn yarns to preheat gas entering the hot box for drawn yarns, so that heat loss is reduced on the premise of keeping good temperature stability in the hot box, and the purposes of energy conservation and emission reduction are achieved.
In order to solve the technical problems, the invention adopts the technical scheme that:
a hot box for drawn yarns is characterized in that: the device comprises a box body, wherein a processing chamber for drafting tows and a heating chamber for heating auxiliary gas are arranged in the box body;
a main heating unit is arranged in the processing chamber;
the heating chamber is internally provided with an auxiliary heating unit, the air inlet end of the heating chamber is arranged outside the box body, and the air outlet end of the heating chamber is communicated with the processing chamber.
Furthermore, the main heating unit comprises a plurality of heating plates which are arranged at intervals along the drafting direction of the drafted filament bundle, and an auxiliary gas distribution pipe is arranged in a gap between every two adjacent heating plates;
the extending direction of the auxiliary gas distribution pipe is consistent with the length direction of the gap;
and the gas inlets of the auxiliary gas distribution pipes are communicated with the heating chamber, and the gas outlets of the auxiliary gas distribution pipes are communicated with the processing chamber.
Furthermore, the heating plates are arranged on the upper side and the lower side of the processing chamber, a yarn channel is formed between the oppositely arranged heating plates, one end of the yarn channel is provided with a yarn inlet, and the other end of the yarn channel is provided with a yarn outlet;
the air inlet of the auxiliary gas distribution pipe is arranged on one side far away from the filament channel, and a plurality of air outlet holes are arranged on one side of the auxiliary gas distribution pipe facing the filament channel along the extension direction of the auxiliary gas distribution pipe to form the air outlet;
preferably, the auxiliary gas distribution pipe is disposed in a gap formed by a heating plate on a lower side of the process chamber.
Further, the extension of the auxiliary gas distribution tube is not less than 90% of the extension of the gap.
Further, the heating chamber is connected with an air inlet pipe, and an air inlet of the air inlet pipe forms the air inlet end;
and the air inlet pipe is provided with an adjusting unit for adjusting the flow of the auxiliary gas.
Furthermore, the heating plate is connected with a height adjusting unit for adjusting the height of the yarn channel.
Preferably, the height adjusting unit comprises a bolt and a nut which are matched with each other, one end of the bolt is fixedly connected with the heating plate, the other end of the bolt is in threaded connection with the nut, and the telescopic length of the bolt is adjusted through the nut.
Further, the device also comprises a bracket;
the box body is arranged on the bracket;
the box body comprises a first box body and a second box body which are mutually buckled, the first box body and the second box body are in pivot connection, and heating plates arranged at the upper side and the lower side are respectively arranged in the first box body and the second box body;
and the support is provided with a hoisting unit for opening the first box body.
Further, the hoisting unit comprises
The connecting rod is fixedly connected with the first box body;
the base of the air cylinder is hinged to the support, and a piston rod of the air cylinder is connected with the connecting rod.
Further, a stainless steel plate is arranged on the inner wall of the box body;
preferably, the stainless steel plate is provided with stainless steel bars.
Furthermore, heat insulation units for heat insulation are arranged between the processing chamber and the inner wall of the box body and between the heating chamber and the inner wall of the box body.
After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects.
The temperature of the nitrogen entering the heating cavity is relatively low, and after the nitrogen is preheated by the auxiliary heating unit in the heating cavity and reaches the degree of being balanced with the temperature in the processing cavity, the preheated nitrogen is conveyed to the processing cavity through the air outlet end of the heating cavity, so that the temperature stability in the processing cavity is not damaged, an inert environment can be provided for the processing cavity, the conveying links of the preheated nitrogen can be reduced, and the purposes of energy conservation and emission reduction are achieved.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1 is a schematic view showing the overall structure of a hot box for drawing a yarn according to the present invention;
FIG. 2 is a side view schematic of the structure of FIG. 1;
FIG. 3 is a schematic top view of the structure of FIG. 1;
in the figure: 10. a box body; 11. a first case; 12. a second case; 13. a processing chamber; 14. a heating chamber; 15. a main heating unit; 16. an auxiliary heating unit; 17. an auxiliary gas distribution tube; 18. a temperature sensor; 19. an air inlet pipe; 20. a height adjustment unit; 21. a shear pin; 22. a connecting rod; 23. a cylinder; 24. a support; 25. a high density ceramic fiberboard; 26. ceramic fiber ceramic shield blankets; 27. a wire inlet; 28. and a filament outlet.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 to 3, the present invention provides a hot box for drawing a filament, including a box body 10, wherein a processing chamber 13 for drawing a filament bundle and a heating chamber 14 for heating an auxiliary gas are provided in the box body 10. A main heating unit 15 is arranged in the processing chamber 13; an auxiliary heating unit 16 is arranged in the heating chamber 14. The inlet end of the heating chamber 14 is arranged outside the box body 10, and the outlet end of the heating chamber 14 is communicated with the processing chamber 13.
In detail, the temperature inside the processing chamber 13 is relatively high, typically between 200 ℃ and 400 ℃. Therefore, in order to avoid degradation or aging of the fiber tow in the processing chamber 13 due to the action of air or oxygen, the gas entering the heating chamber 14 from the gas inlet end of the heating chamber 14 is preferably nitrogen, and may be one or a combination of gases such as inert gas and carbon dioxide, and is used for maintaining an inert environment under high temperature conditions inside the heat box.
To illustrate the embodiments of the present invention in detail, nitrogen is used as an example.
The temperature of the nitrogen gas entering the heating chamber 14 is relatively low, and when the nitrogen gas is preheated by the auxiliary heating unit 16 in the heating chamber 14 and reaches the temperature balance degree in the processing chamber 13, the preheated nitrogen gas is conveyed to the processing chamber 13 through the gas outlet end of the heating chamber 14. The scheme does not destroy the temperature stability in the treatment chamber 13, can provide an inert environment for the treatment chamber 13, can reduce the conveying link of preheated nitrogen, and achieves the purposes of energy conservation and emission reduction.
In some embodiments of the present invention, as shown in fig. 1, the main heating unit 15 in the processing chamber 13 comprises a plurality of heating plates spaced apart along the drawing direction of the drawn tow, and an auxiliary gas distribution pipe 17 is disposed in the gap between two adjacent heating plates. The direction of extension of said auxiliary gas distribution tubes 17 coincides with the length direction of the gap. The gas inlets of the auxiliary gas distribution pipes 17 are communicated with the heating chamber 14, and the gas outlets of the auxiliary gas distribution pipes 17 are communicated with the processing chamber 13.
The temperature of the heating plate may be increased by electric heating or by radiation heating using a thermal fluid, thereby maintaining a high temperature environment in the processing chamber 13. In addition, the temperature control operation can be independently carried out on each heating plate, the process adjustment range is wider, and the drafting temperature requirements of different fibers are met. It is also possible that each heating plate corresponds to a set of temperature sensors 18 in order to ensure that the heating plates work properly. The temperature sensor 18 is interlocked with the heating power supply, and the output of the heating current is controlled by a temperature set value. The power of each heating plate may be the same or different.
Similarly, the auxiliary heating unit 16 may be electrically heated or heated by radiation with a hot fluid. The auxiliary heating unit 16 may also be provided with a temperature sensor 18 or the like for controlling the temperature of the auxiliary heating unit 16.
Preferably, the auxiliary heating unit 16 is a coil heating rod.
The heating plates are arranged at intervals along the drafting direction of the drafting tows, a gap is formed between every two adjacent heating plates, the auxiliary gas distribution pipe 17 is arranged in the gap, the heating plates and the auxiliary gas distribution pipe 17 are alternately arranged at intervals in the drafting direction of the drafting tows, and under the action of the high-temperature heating plates and the high-temperature auxiliary gas, the uniform temperature inside the processing chamber 13 is ensured, and a constant-temperature area is formed.
In addition, the whole heating plate is of a plate-shaped structure, the extending direction of the auxiliary gas distribution pipe 17 is consistent with the length direction of the gap, so that the length of the heating plate and the auxiliary gas distribution pipe 17 is more than 90% of the length of the treatment chamber 13, the size of the constant temperature area is more than 90% of the total size of the hot box, and the drafting effect of the fiber tows is further improved. In a preferred embodiment, the extension of the auxiliary gas distribution pipe 17 is not less than 90% of the extension of the gap.
The heating plate in the scheme is composed of copper material, aluminum material and copper-aluminum alloy.
In a further scheme, the heating plates are arranged on the side walls of the upper side and the lower side of the processing chamber 13, a yarn channel is formed between the oppositely arranged heating plates, one end of the yarn channel is provided with a yarn inlet 27, and the other end of the yarn channel is provided with a yarn outlet 28. The air inlet setting of supplementary gas distribution pipe 17 is in supplementary gas distribution pipe 17 is kept away from one side of silk way, supplementary gas distribution pipe 17 orientation one side of silk way is followed the extending direction in clearance is provided with a plurality of ventholes.
In detail, heating plates are disposed on the sidewalls of the upper and lower sides of the processing chamber 13, and a yarn path is formed between the heating plates disposed opposite to each other. After entering the fiber channel from the fiber inlet 27, the fiber tow is heated by the upper and lower heating plates to complete the drawing deformation and then extends out from the fiber outlet 28.
In the above process, the nitrogen gas entering the processing chamber 13 from the air outlet is discharged from the filament outlet 28 under the entrainment effect of the fiber tows, so that the air pressure balance between the inside of the processing chamber 13 and the external environment is maintained.
The auxiliary gas distribution pipe 17 is preferably disposed in a gap formed by a heating plate on the lower side of the process chamber 13. Because the nitrogen with higher temperature has smaller density, the auxiliary gas distribution pipe 17 is arranged at the lower side, so that the nitrogen forms natural convection in the treatment chamber 13, the temperature fluctuation or pressure fluctuation caused by inputting the nitrogen into the treatment chamber 13 is further reduced, and the influence on the fiber tows is reduced.
In the preferred scheme, the gas outlets are uniformly arranged on the auxiliary gas distribution pipe 17, so that the auxiliary gas is more uniformly distributed in the processing chamber 13, and the stability of the inert environment is improved.
In some embodiments of the present invention, an air inlet pipe 19 is connected to the heating chamber 14, and an air inlet of the air inlet pipe 19 constitutes the air inlet end. And the air inlet pipe 19 is provided with an adjusting unit for adjusting the flow of the auxiliary gas.
In detail, the inlet end of the heating chamber 14 of the present invention is disposed outside the cabinet 10, and nitrogen gas having a relatively low temperature is introduced into the heating chamber 14 from outside the cabinet 10. In order to ensure the balance of the gas pressure in the processing chamber 13, a regulating unit for regulating the flow rate of nitrogen gas is provided on the gas inlet pipe 19. Preferably, the regulating unit is a gas flow regulating valve.
In some embodiments of the present invention, a height adjusting unit 20 is connected to the heating plate for adjusting the height of the yarn path.
In detail, the gap between the heating plates which are oppositely arranged up and down forms the yarn path, and the height range of the yarn path is adjustable between 1mm and 20mm through the height adjusting unit 20.
Preferably, the height adjusting unit 20 includes a bolt and a nut that are matched with each other, one end of the bolt is fixedly connected with the heating plate, the other end of the bolt is in threaded connection with the nut, and the telescopic length of the bolt is adjusted through the nut.
The adjusting nut can make the bolt move up and down to drive the heating plate to move up and down, thereby achieving the purpose of adjusting the height of the thread channel.
Preferably, the height adjusting unit 20 is provided on a heating plate located at an upper side of the process chamber 13, and adjusts the height of the yarn path by adjusting the height of the heating plate at the upper side.
In some embodiments of the present invention, as shown in fig. 2 and 3, the hot box for drawing the filaments further comprises a support 24, and the box body 10 is disposed on the support 24.
The box 10 comprises a first box 11 and a second box 12 which are buckled with each other, heating plates arranged at the upper side and the lower side are respectively arranged in the first box 11 and the second box 12, and the first box 11 is pivotally connected with the second box 12. The second case 12 is connected to the bracket 24; a hoisting unit for opening the first box body 11 is arranged between the first box body 11 and the bracket 24.
In detail, the first casing 11 is provided with a first recess, the second casing 12 is provided with a second recess, and the positions of the first recess and the second recess are matched with each other, so that the first recess and the second recess are buckled to form the processing chamber 13 after the first casing 11 and the second casing 12 are buckled.
The heating plates provided at both upper and lower sides in the processing chamber 13 are respectively provided in the first recess of the first casing 11 and the second recess of the second casing 12.
When the first casing 11 is opened by the hoisting means, the first recess and the heater plate provided in the first recess are made to be in the form of an "angle" as a whole with the second recess and the heater plate provided in the second recess. The opening angle is controlled within the range of 30-120 degrees.
In the normal wire guiding or wire threading overtravel, the opening angle is controlled to be about 30 degrees, and the minimum heat loss in the heat using box is ensured.
When the hot box needs to be cleaned, the opening angle is larger than 90 degrees, the operation convenience of personnel is ensured, and simultaneously, the operation is safe and reliable.
Preferably, the first casing 11 is pivotally connected to the second casing 12 by a shear pin 21.
In a specific scheme, the hoisting unit comprises a connecting rod 22 and a cylinder 23.
The connecting rod 22 is fixedly connected with the first box body 11; the base of the air cylinder 23 is hinged with the bracket 24, and the piston rod of the air cylinder 23 is connected with the connecting rod 22.
In detail, the base of the cylinder 23 is connected to the bracket 24 through a hinged support, and when the angle between the first box 11 and the second box 12 needs to be increased, the piston rod of the cylinder 23 retracts to drive the connecting rod 22 to move upwards, so as to drive the first box 11 to open. When the angle between the first box 11 and the second box 12 needs to be reduced, the piston rod of the cylinder 23 extends to drive the connecting rod 22 to move downwards, so as to drive the first box 11 to move towards the closing direction.
In addition, the bottom of the bracket 24 is provided with feet for adjusting the balance.
In some embodiments of the present invention, the inner wall of the case 10 is provided with a stainless steel plate; preferably, the stainless steel plate is provided with stainless steel bars.
In detail, in order to further ensure that the heat box does not deform under heat, the inside of the heat box is made of a stainless steel plate.
The thickness of the stainless steel plate is within the range of 10 mm-50 mm.
In order to further ensure that the hot box does not deform, stainless steel bars are added on the surface of the stainless steel plate.
Under the effect of the stainless steel bars, the stainless steel plates can be protected from deformation under the heated condition, so that the sealing performance and the temperature uniformity of the equipment cannot be influenced.
In some embodiments of the present invention, the wall of the processing chamber 13 is provided with a high-density ceramic fiber board 25, which can meet the requirement of high temperature.
Further, heat insulating means for heat insulation are provided between the processing chamber 13 and the inner wall surface of the casing 10 and between the heating chamber 14 and the inner wall surface of the casing 10, thereby further improving the constant temperature performance of the heat box.
The insulating unit is preferably a ceramic fiber ceramic shield blanket 26.
The temperature inside the processing chamber 13 of the hot box for the drawn yarns is uniform, the temperature difference in any region is lower than 0.5 ℃, and when the working temperature reaches 400 ℃, the hot box is used for keeping the deformation.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A hot box for drawn yarns is characterized in that: the device comprises a box body, wherein a processing chamber for drafting tows and a heating chamber for heating auxiliary gas are arranged in the box body;
a main heating unit is arranged in the processing chamber;
the heating chamber is internally provided with an auxiliary heating unit, the air inlet end of the heating chamber is arranged outside the box body, and the air outlet end of the heating chamber is communicated with the processing chamber.
2. The hot box for drawn wires according to claim 1, wherein:
the main heating unit comprises a plurality of heating plates which are arranged at intervals along the drafting direction of the drafted tows, and an auxiliary gas distribution pipe is arranged in a gap between every two adjacent heating plates;
the extending direction of the auxiliary gas distribution pipe is consistent with the length direction of the gap;
and the gas inlets of the auxiliary gas distribution pipes are communicated with the heating chamber, and the gas outlets of the auxiliary gas distribution pipes are communicated with the processing chamber.
3. The hot box for drawn wires according to claim 2, wherein:
the heating plates are arranged on the upper side and the lower side of the processing chamber, a yarn channel is formed between the oppositely arranged heating plates, one end of the yarn channel is provided with a yarn inlet, and the other end of the yarn channel is provided with a yarn outlet;
the air inlet of the auxiliary gas distribution pipe is arranged on one side far away from the filament channel, and a plurality of air outlet holes are arranged on one side of the auxiliary gas distribution pipe facing the filament channel along the extending direction of the gap to form the air outlet;
preferably, the auxiliary gas distribution pipe is disposed in a gap formed by a heating plate on a lower side of the process chamber.
4. The hot box for drawn wires according to claim 3, wherein:
the auxiliary gas distribution tube extends no less than 90% of the gap length.
5. The hot box for drawn wires according to any one of claims 1 to 4, wherein:
the heating chamber is connected with an air inlet pipe, and an air inlet of the air inlet pipe forms the air inlet end;
and the air inlet pipe is provided with an adjusting unit for adjusting the flow of the auxiliary gas.
6. A hot box for drawn wires according to claim 2 or 3, wherein:
the heating plate is connected with a height adjusting unit for adjusting the height of the yarn channel;
preferably, the height adjusting unit comprises a bolt and a nut which are matched with each other, one end of the bolt is fixedly connected with the heating plate, the other end of the bolt is in threaded connection with the nut, and the telescopic length of the bolt is adjusted through the nut.
7. The hot box for drawn wires according to claim 3, wherein: the device also comprises a bracket;
the box body is arranged on the bracket;
the box body comprises a first box body and a second box body which are mutually buckled, the first box body and the second box body are in pivot connection, and heating plates arranged at the upper side and the lower side are respectively arranged in the first box body and the second box body;
and the support is provided with a hoisting unit for opening the first box body.
8. The hot box for drawn wires according to claim 7, wherein:
the hoisting unit comprises
The connecting rod is fixedly connected with the first box body;
the base of the air cylinder is hinged to the support, and a piston rod of the air cylinder is connected with the connecting rod.
9. The hot box for drawn wires according to claim 1, wherein:
the inner wall of the box body is provided with a stainless steel plate;
preferably, the stainless steel plate is provided with stainless steel bars.
10. The hot box for drawn wires according to claim 1, wherein:
and heat insulation units for heat insulation are arranged between the processing chamber and the inner wall of the box body and between the heating chamber and the inner wall of the box body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110076209.6A CN112921422B (en) | 2021-01-20 | 2021-01-20 | Hot box for drawing yarns |
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|---|---|---|---|
| CN202110076209.6A CN112921422B (en) | 2021-01-20 | 2021-01-20 | Hot box for drawing yarns |
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| CN112921422B CN112921422B (en) | 2022-08-30 |
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| CN204196077U (en) * | 2014-10-31 | 2015-03-11 | 陈路 | A kind of heater for the manufacture of PTFE sewing thread |
| CN104625501A (en) * | 2014-12-24 | 2015-05-20 | 河野精机(大连)有限公司 | Special girth welding opening and closing machine capable of automatically tracking welding position |
| CN206970749U (en) * | 2017-05-03 | 2018-02-06 | 江苏锵尼玛新材料股份有限公司 | A kind of high-strength and high-modulus high polymer polyethylene fiber production drafting heat box |
| WO2019084618A1 (en) * | 2017-11-02 | 2019-05-09 | Furnace Engineering Pty Ltd | Controlled atmosphere recirculation oven |
| CN207457310U (en) * | 2017-11-20 | 2018-06-05 | 东莞市欣巨电子设备有限公司 | A kind of laborsaving opening and closing shielded box |
| CN207987370U (en) * | 2018-03-08 | 2018-10-19 | 上海舟汉纤维材料科技有限公司 | Online polyarylate fiber stretch processing device |
| US20200399790A1 (en) * | 2018-03-09 | 2020-12-24 | centrotherm international AG | Method and device for stabilizing precursor fibers for the production of carbon fibers |
| CN109881271A (en) * | 2019-03-01 | 2019-06-14 | 绍兴裕辰新材料有限公司 | The method and apparatus of spinning |
| CN210596335U (en) * | 2019-07-24 | 2020-05-22 | 龙游龙纤新材料有限公司 | Drafting hot box for producing high-strength high-modulus polyethylene fibers |
| CN111472053A (en) * | 2020-05-26 | 2020-07-31 | 东莞市力创机械有限公司 | Temperature and pressure sensing automatic control melt-blowing machine and textile fabric fiber forming process thereof |
| CN111910271A (en) * | 2020-06-19 | 2020-11-10 | 中国纺织科学研究院有限公司 | Spinning equipment and slow cooling device thereof |
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